This is a magnetic pen holder sized for the Lenovo Pen Plus and 12x3mm magnets. I printed roughly at 0.30mm layer height, with tree supports, and I was able to press-fit my 12x3mm magnets. Perhaps try 0.15mm for a better finish.
The author remixed this model.
I used the customizer to fit the Lenovo Pen Plus and 12x3mm magnets
codeandmake.com_Pen_Holder_Fridge_Magnet_v1.0.json
{ "fileFormatVersion": "1", "parameterSets": { "New set 1": { "Magnet_Hole_Depth": "3.1000000000000001", "Magnet_Hole_Diameter": "12", "Material_Thickness": "2", "Pen_Hole_Depth": "60", "Pen_Hole_Diameter": "11" } }}